<template>
  <div :class="className" :style="{height:height,width:width}"></div>
</template>

<script>
import echarts from "echarts";
require("echarts/theme/macarons"); // echarts theme
import { debounce } from "@/utils";

const animationDuration = 6000;

export default {
  props: {
    className: {
      type: String,
      default: "chart"
    },
    width: {
      type: String,
      default: "100%"
    },
    height: {
      type: String,
      default: "300px"
    },
    customerNum: {
      type: Object,
      required: true
    }
  },
  data() {
    return {
      chart: null,
      seriesData: [],
      legendData: []
    };
  },
  watch: {
    customerNum: {
      deep: true,
      handler(val) {
        this.initChart(val);
      }
    }
  },
  mounted() {
    this.initChart();
    this.__resizeHanlder = debounce(() => {
      if (this.chart) {
        this.chart.resize();
      }
    }, 100);
    window.addEventListener("resize", this.__resizeHanlder);
  },
  beforeDestroy() {
    if (!this.chart) {
      return;
    }
    window.removeEventListener("resize", this.__resizeHanlder);
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    initChart(customerNum) {
      this.chart = echarts.init(this.$el, "macarons");
      if (customerNum) {
        customerNum.names.map(item => {
          this.legendData.push(item);
        });
        customerNum.nums.map(item => {
          this.seriesData.push(item);
        });
      }

      this.chart.setOption({
        tooltip: {
          trigger: "axis",
          axisPointer: {
            // 坐标轴指示器，坐标轴触发有效
            type: "shadow" // 默认为直线，可选为：'line' | 'shadow'
          }
        },
        grid: {
          top: 10,
          left: "2%",
          right: "2%",
          bottom: "3%",
          containLabel: true
        },
        xAxis: [
          {
            type: "value",
            max: function(value) {
              return value.max + 5;
            }
          }
        ],
        yAxis: [
          {
            type: "category",
            data: this.legendData,
            axisTick: {
              alignWithLabel: true
            },

          }
        ],
        series: [
          {
            name: "数量",
            type: "bar",
            barWidth: "45%",
            data: this.seriesData,
            label: {
              normal: {
                  show: true,
                  position: 'right'
              }
            }
          }
        ]
      });
    }
  }
};
</script>
